General Tolerance Iso 2768-mk Upd
ISO 2768-mK standard defines general tolerances for dimensions and geometric features on technical drawings where specific tolerances are not indicated. It simplifies drawings by providing a default "medium" level of precision, ensuring parts fit together without over-specifying every dimension. Meaning of "mK" "m" (Medium) : Refers to ISO 2768-1 , covering general tolerances for linear and angular dimensions (lengths, diameters, radii, chamfers). "K" (Medium) : Refers to ISO 2768-2 , covering general geometrical tolerances
Radii and Chamfers (Class 'm')
: Reduces drawing clutter by only requiring specific tolerances for high-precision "functional" areas. : Parts with tighter tolerances than "mK" (such as plus or minus general tolerance iso 2768-mk
- ISO 2768-1: Covers linear and angular dimensions.
- ISO 2768-2: Covers geometrical tolerances (straightness, flatness, perpendicularity, symmetry, runout).
Circular Run-out
| Nominal Length of Shorter Side (mm) | Permissible Deviation (mm/m or degrees) | | :--- | :--- | | Up to 10 | ±1° | | >10 up to 50 | ±0°30' | | >50 up to 120 | ±0°20' | | >120 up to 400 | ±0°10' | | >400 | ±0°5' | ISO 2768-1: Covers linear and angular dimensions
Or, if you want to be explicit: